Mechanism of Skeletal Isomerization of n-Butane Using 1,4-~13C_2-n-Butane on Solid Strong Acids

摘要

Mechanism of skeletal isomerization of n-butane over Cs_2.5H_0.5PW_12O_40 as well as sulfated ZrO_2 was revealed at a temperature range 393-523 K by using 1,4-~13C_2-n-butane. ~13C-Distributions of isobutane at 393 K were close to binomial distribution, indicating a bimolecular pathway. On the other hand, an intramolecular (monomolecular) rearrangement became significant over Cs_2.5H_0.5PW_12O_40 at 523 K.